Development and application of a portable Raman spectrometer for detecting corrosion products in nuclear materials
CHEN Guang1, LI Gan1, WANG Shuaipeng2, WANG Maocheng1, HU Yin1, LI Haibo*1
1. Science and Technology on Surface Physics and Chemistry Laboratory, Mianyang 621908, China; 2. Institute of Material and Science, Chinese Academic of Engineering and Physics, Mianyang 621907, China
Abstract：Raman spectroscopy is a kind of molecular fingerprint spectroscopy, and it has the advantages of non-destructive, high resolution, high sensitivity and non-contact. Therefore, Raman spectroscopy is very suitable for the detection of corrosion products of highly radioactive and expensive nuclear materials. However, the existing commercially available Raman spectroscopy instruments can hardly realize the on-site detection of corrosion products of nuclear materials with weak signals. The major problems are reflected in the low sensitivity of portable Raman spectrometers and inconvenient movement of desktop micro-Raman spectrometers. For this reason, a portable Raman spectrometer was developed in this study through a series of improvement measures based on independently designed reflective probe, high luminous flux spectrometer, scientific level and high deep cooling CCD. The sensitivity was significantly improved, and meanwhile, the spectral background was greatly reduced. Thus, the shortcomings of portable Raman spectrometer in weak detection signals were overcome. The developed spectrometer was applied for the detection of certified reference materials (UO2, U4O9 and U3O8) and mixture (U3O8 and UO2) of uranium corrosion products. The Raman spectra obtained had low background and clear characteristic peaks, which could detect the signals of corrosion products (U3O8) of nuclear materials with 5% content (mass fraction). The uranium materials in three corrosion states were tested. It was found that the different corrosion products could be distinguished and identified. This study provided reference for the scientific understanding of corrosion mechanism and behavior of uranium materials.
陈广, 李赣, 王帅鹏, 王茂成, 胡殷, 李海波. 面向核材料腐蚀产物检测的便携式拉曼光谱仪的研制及应用[J]. 冶金分析, 2024, 44(5): 8-13.
CHEN Guang, LI Gan, WANG Shuaipeng, WANG Maocheng, HU Yin, LI Haibo. Development and application of a portable Raman spectrometer for detecting corrosion products in nuclear materials. , 2024, 44(5): 8-13.
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